import {
  baseEsLintConfigFile,
  eslintConfigFileWhitelist,
  findEslintFile,
  lintConfigHasOverride,
} from './eslint-file';

import { Tree } from '@nx/devkit';
import { createTreeWithEmptyWorkspace } from '@nx/devkit/testing';

describe('@nx/linter:eslint-file', () => {
  let tree: Tree;

  beforeEach(() => {
    tree = createTreeWithEmptyWorkspace({ layout: 'apps-libs' });
  });

  describe('findEslintFile', () => {
    it('should return null when calling findEslintFile when no eslint is found', () => {
      expect(findEslintFile(tree)).toBe(null);
    });

    test.each(eslintConfigFileWhitelist)(
      'should return %p when calling findEslintFile',
      (eslintFileName) => {
        tree.write(eslintFileName, '{}');
        expect(findEslintFile(tree)).toBe(eslintFileName);
      }
    );

    test.each(eslintConfigFileWhitelist)(
      'should return base file instead %p when calling findEslintFile',
      (eslintFileName) => {
        tree.write(baseEsLintConfigFile, '{}');
        tree.write(eslintFileName, '{}');
        expect(findEslintFile(tree)).toBe(baseEsLintConfigFile);
      }
    );
  });

  describe('lintConfigHasOverride', () => {
    it('should return true when override exists in eslintrc format', () => {
      tree.write(
        '.eslintrc.json',
        '{"overrides": [{ "files": ["*.ts"], "rules": {} }]}'
      );
      expect(
        lintConfigHasOverride(
          tree,
          '.',
          (o) => {
            return o.files?.includes('*.ts');
          },
          false
        )
      ).toBe(true);
    });

    it('should return false when eslintrc is not in JSON format', () => {
      tree.write(
        '.eslintrc.js',
        'module.exports = {overrides: [{ files: ["*.ts"], rules: {} }]};'
      );
      expect(
        lintConfigHasOverride(
          tree,
          '.',
          (o) => {
            return o.files?.includes('*.ts');
          },
          false
        )
      ).toBe(false);
    });
  });
});